Azuma is one of Section 9s new recruits in 2nd GIG. Azuma was recruited as one of the field operatives in Section 9 from JGSDF Intelligence. He was present at the shipyard battle in which fellow rookie Yano died and was pulled out of field duty prior to the Dejima confrontation. At the end of 2nd Gig it is implied that Azuma is now a full fledged member of Section 9. Source: Ghost in the Shell Wikia